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Browsing by Author "Mekkaden, M. V"

Browsing by Author "Mekkaden, M. V"

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  • Observations of variables 
    Rosario, M. J; Muneer, S; Raveendran, A. V; Mekkaden, M. V (IBVS / Konkoly Observatory, 2010-12)
    UX Ari was observed on a total of 33 nights during December 2008-February 2010 in standard Johnson BV bands with the 34-cm tel escope of Vainu Bappu Observatory, Kavalur. All the measurements were made with respect to 62 ...
  • On the photometric period of HD 81410 
    Raveendran, A. V; Mekkaden, M. V; Mohin, S (Konkoly Observatory, 1981-06)
  • Orbital period modulation and spot activity in the RS CVn binary V711 Tauri 
    Muneer, S; Jayakumar, K; Rosario, M. J; Raveendran, A. V; Mekkaden, M. V (EDP Sciences, 2010-10)
    We attempt to establish the real nature of the orbital period variation and its relation to the spot activity of V711 Tau, and determine why the (B–V) colour of the star appears to be nearly independent of its V magnitude. ...
  • Periodic activity in the T Tauri star TW Hya 
    Mekkaden, M. V (Astronomical Society of India, 1990)
    UBVRI photometry of the isolated T Tauri star TW Hya, obtained during 1987 April from ESO, is presented. The data analysis shows a periodicity of 2.195 d in light variation. The steep increase of amplitude towards shorter ...
  • Photometric and polarimetric variability of the isolated T Tauri star TW Hydrae 
    Mekkaden, M. V (The European Southern Observatory, 1998-12)
    The photometric and polarimetric observations of the isolated T Tauri star TW Hya are presented. It is found that a period 2.196 days derived from the present data satisfies all the available photometry. The steep increase ...
  • Photometric Study of HD224085 
    Raveendran, A. V; Mohin, S; Mekkaden, M. V (Royal Astronomical Society, 1981-07)
    B and V photometry of HD 224085 obtained on 21 nights between 1979 November and 1980 February is presented. The amplitudes of light variation observed are ~ 0.15mag in both B and V. The photometric period is found to be ...
  • Photometric study of the RS CVn binary II Pegasi 
    Mohin, S; Raveendran, A. V; Mekkaden, M. V (Astronomical Society of Indian, 1986-03)
    An analysis of available data and of B and V photometry obtained at Kavalur on 39 nights during the 1980-81, 1981-82, and 1984-85 observing seasons of II Peg shows no two light curves to agree in shape, amplitude, phases ...
  • Photometric Variability of HD 81410 in 1988 
    Mekkaden, M. V; Sinachopoulos, D (Konkoly Observatory, 1988-08-15)
  • Photometric Variability of HR 3119 
    Mekkaden, M. V; Raveendran, A. V; Mohin, S (Konkoly Observatory, 1982-10)
  • Photometric, spectroscopic and polarimetric variability of the weak-emission T Tauri star HD 288313 
    Mekkaden, M. V; Muneer, S; Raveendran, A. V (Blackwell Publishing, 2007-07)
    Photometric observations over three seasons show HD 288313 to be a light variable with a 2.2636-d period. The observed V amplitudes lie in the range of 0.06–0.15 mag. The star showed appreciable changes in the brightness ...
  • Photometry during the end-phase of a spot cycle in II Peg* 
    Mekkaden, M. V (European Southern Observatory, 1987-07-03)
  • Photometry of HD 166181 
    Mekkaden, M. V; Raveendran, A. V; Mohin, S (Konkoly Observatory, 1980-05)
  • Photometry of the Rs-Canum Binary II-PEG 
    Mohin, S; Raveendran, A. V; Mekkaden, M. V (International Astronomical Union, 1986)
    B and V photometry of II Peg obtained at Kavalur on 39 nights during 1980 - 81, 1981 - 82 and 1984 - 85 is presented. From an analysis of the available data on this object the authors find that no two light curves agree ...
  • Photometry of Zeta Aurigae during the 1977 and 1979-80 Eclipses 
    Mohin, S; Raveendran, A. V; Mekkaden, M. V (Indian Institute of Astrophysics, Bangalore, 1980)
    UBV photometry of Zeta Aurigae during the 1977 and 1979-80 eclipses is presented. From an analysis of the available photometry, it is concluded that the long term intrinsic variation in the brightness of the late-type super ...
  • Polarimetric and spectroscopic study of the weak-emission T Tauri star V 410 Tauri 
    Mekkaden, M. V (European Southern Observatory, 1999-04)
    Results of the polarimetric and spectroscopic observations of the weak emission T Tauri star V 410 Tau are presented. The linear polarization and position angle are found to show variability with a period corresponding to ...
  • Polarization Variability in Isolated T-Tauri Stars 
    Mekkaden, M. V (Indian Academy of Sciences, 1995-12)
  • Recent photometry of HR 1099 (V711 Tau) 
    Mohin, S; Raveendran, A. V; Mekkaden, M. V; Jayakumar, K; Rosario, M. J (Konkoly Observatory, 1982-08)
  • Rotation and H-alpha emission activity in F8-G3 dwarfs 
    Mekkaden, M. V (Kluwer Academic Publishers, 1985-12)
    The dependence of H-alpha emission strength on rotational period and spectral type in late-type stars is studied using published data. The emission strength shows strong correlation with rotation irrespective of age and ...
  • RS CVn-type variables. I - Photometry of HR 1099 
    Parthasarathy, M; Raveendran, A. V; Mekkaden, M. V (D. Reidel Publishing Co., 1981-01)
    Photometric observation of HR 1099 inV andB obtained on 18 nights between January and March 1977 is presented. The amplitude of the asymmetric light curve is found to be 0m.10±0m.004 both inV andB. On three occasions—namely, ...
  • Search for activity signatures in T Thuri stars 
    Mekkaden, M. V (Astronomical Society of India, 2002-09)
    T Tauri stars are young, low mass, pre-main sequence stars. They exhibit a large variety of properties characteristic of earlier as well as later evolutionary phases and represent an important phase in the stellar ...

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